diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 3ee19920ae9..88d7f6b73a8 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -1155,7 +1155,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       applyPreDefendAbAttrs(MoveImmunityAbAttr, this, source, move, cancelled, typeMultiplier, true);
     }
 
-    return (!cancelled.value ? typeMultiplier.value : 0) as TypeDamageMultiplier;
+    return (!cancelled.value ? Number(typeMultiplier.value) : 0) as TypeDamageMultiplier;
   }
 
   getAttackTypeEffectiveness(moveType: Type, source?: Pokemon, ignoreStrongWinds: boolean = false): TypeDamageMultiplier {